//
//  SignModel.m
//  便签
//
//  Created by  on 2022/10/1.
//

#import "SignModel.h"

@implementation SignModel
+ (NSArray *)bg_unionPrimaryKeys
{
    return @[@"account",@"ID"];

}
-(NSData *)cover{
    if (!_cover) {
        _cover = [NSData data];
    }
    return _cover;
}
@end
